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參數(shù)資料
| 型號： | HT48C05 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Cost-Effective I/O Type 8-Bit MCU |
| 中文描述： | 成本效益的I / O型8位微控制器 |
| 文件頁數(shù)： | 6/38頁 |
| 文件大?。?/td> | 264K |
| 代理商： | HT48C05 |
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HT48R05A-1/HT48C05/HT48R06A-1/HT48C06
Rev. 1.10
6
June 9, 2004
Program Memory
ROM
The program memory is used to store the program in-
structions which are to be executed. It also contains
data, table, and interrupt entries, and is organized into
512 14 bits (HT48R05A-1/HT48C05) or 1024 14 bits
(HT48R06A-1/HT48C06), addressed by the program
counter and table pointer.
Certain locations in the program memory are reserved
for special usage:
Location 000H
This area is reserved for program initialization. After
chip reset, the program always begins execution at lo-
cation 000H.
Location 004H
This area is reserved for the external interrupt service
program. If the INT input pin is activated, the interrupt
is enabledand the stack is not full, the program begins
execution at location 004H.
Location 008H
This area is reserved for the timer/event counter inter-
rupt service program. If a timer interrupt results from a
timer/event counter overflow, and if the interrupt is en-
abled and the stack is not full, the program begins ex-
ecution at location 008H.
Table location
Any location in the program memory can be used as
look-up tables. The instructions TABRDC [m] (the
current page, 1 page=256 words) and TABRDL [m]
(the last page; However this statement is not valid for
the HT48R05A-1/HT48C05 devices) transfer the con-
tents of the lower-order byte to the specified data
memory, and the higher-order byte to TBLH (08H).
Only the destination of the lower-order byte in the ta-
ble is well-defined, the other bits of the table word are
transferred to the lower portion of TBLH, and the re-
maining 2 bits are read as 0 . The Table Higher-order
byte register (TBLH) is read only. The table pointer
(TBLP) is a read/write register (07H), which indicates
the table location. Before accessing the table, the lo-
cation must be placed in TBLP. The TBLH is read only
and cannot be restored. If the main routine and the
ISR (Interrupt Service Routine) both employ the table
read instruction, the contents of the TBLH in the main
routine are likely to be changed by the table read in-
struction used in the ISR. Errors can occur. In other
words, using the table read instruction in the main rou-
tine and the ISR simultaneously should be avoided.
However, if the table read instruction has to be applied
in both the main routine and the ISR, the interrupt is
supposed to be disabled prior to the table read in-
$ ! & 0 % ! % # $ % ,
9 9 >
>
3 9 9 >
# ' $ ' 0 ' $ ' #
% ( $
: $ % # 0
# $ %
" & $
% ( $
' ! %
" # $ %
# $ %
" & $
% ( $
: $ % # 0
# $ %
" & $
% ( $
' ! %
" # $ %
# $ %
" & $
% ( $
# ' $ ' 0 ' $ ' #
% ( $
4 >
@ ' $ +
@ ' $ +
>
>
Program Memory
Instruction
Table Location
*9
*8
*7
*6
*5
*4
*3
*2
*1
*0
TABRDC [m]
P9
P8
@7
@6
@5
@4
@3
@2
@1
@0
TABRDL [m]
1
1
@7
@6
@5
@4
@3
@2
@1
@0
Table Location
Note: *9~*0: Table location bits
P9, P8: Current program counter bits
@7~@0: Table pointer bits
For HT48R05A-1/HT48C05, the table address location is 9 bits, i.e. from *8~*0
For HT48R06A-1/HT48C06, the table address location is 10 bits, i.e. from *9~*0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HT48C06 | Cost-Effective I/O Type 8-Bit MCU |
| HT48C10-1 | 8-Bit High Performance RISC-like Microcontroller Suitable for Multiple I/O Application(高性能、指令類似RISC的8位微控制器，用于多I/O接口設(shè)備) |
| HT48C50-1 | 8-Bit High Performance RISC-like Microcontroller Suitable for Multiple I/O Application(高性能、指令類似RISC的8位微控制器，用于多I/O接口設(shè)備) |
| HT48C50- | 8-BIT MICROCONTROLLER |
| HT48C70-1 | I/O Type 8-Bit MCU |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT48C05_08 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Cost-Effective I/O Type 8-Bit MCU |
| HT48C06 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Cost-Effective I/O Type 8-Bit MCU |
| HT48C062 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:八位高性能精簡指令集單片機(jī)，專為經(jīng)濟(jì)型多輸入輸出控制的產(chǎn)品設(shè)計(jì) |
| HT48C062_08 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Cost-Effective I/O Type 8-Bit MCU |
| HT48C10 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:8-Bit Microcontroller Series |
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